Safety device for picture-projecting apparatus



J. w. SOUTH. l SAFETY DEVICE FOR PxvcuRE PROJECHNG APPARATUS. APPLICATION FILEDAPR. 2l, i920. 1,376,297, Patented Apr. 26, 192L 2 SHEETS-SHEET I.

Syvum lcsephwsou J. W. SOUTH. A SAFETY nsvfcs FOR FACTURE PRoJecnNG APPARATUS.

APPLICATION FILED PR. 21,1920. 1,376,297, Patented Apr. 26, 1921.

'2 SHEETS-SH'ET 2.

' JOSQPAWSAAA s, in

To all who/'nt may concern:

lie it known that l', lossen lV. SOUTH, a citizen of the ilnited States.y residing; at lilemphii in the county of Shelby and State ol' rlennes. e, have invented certain new and useful impr vements in Safety Devices for Picture-liojcoting npparatus, o' which the following` is a specilication.

This invention relates to lire 'prevention apparatus for movingr picture n'iachines and has 'for an object to provide new and im- 'proved means v.to 'nitro/luce an obstruction between the source oi light and the film to protect the lil'rn 'from overheating by the focused rays oi light in case oi breakage, or any interruption ot the movement of the iilrnv in normal direction, such as may' be caused by bucklingg;splitting, piling up, or other cause, as 'will be readily understood.

Further object of the invention is to provide a closure for the ligijhtprojecting tube to retain the light rays'wholly Within the projecting tube.

lilith these and other objects in View the device comprises certainnovel units, elements and combinations as will be vhereiny after more fully. described and claimed,

Referring to the accompanying drawings which are part hereoi and on which similar roter-ence characters Iindicate similar apparatus a perspectwe View oi the invention disassociated from the projecting ap I' paratus.

' t is `Well known that the film of a' moving' picture projector operates continuously in the 'focus or' the light 1ays from the projecting lantern which focus produces a very high temperature-at the film, which is intlamn'ial'ile. he present invention comprises means to be associated with the hood or light tube l() olf e projecting lantern 'for closing' the lio-lit aperture. in case of breakor any interruption o'l the normal movement or the film, such Closure comprising; a eoycr member 11v hinged to the projecting tulle as at l2.

'lomaintain the closure ordinarily at open or `projeci'ciuq position and to close it antomatically at the breaking' ot' the film the apparatus ol' the present application is asso- .epplicaten filed April 21, 1953 Serial lle. $75,516;

Specification o Letters ratent. lfpmt Army: gig, D321 v ciated with the film feeding device.' At lli".- 1- the-film magazine is indicated at 13 and the taire-up reel at 14:. Between the magazine and the taleup reel are positioned the usual leerling mechanisms eon'iprising the Geneva movement 15, the uniformly driven rollers 16 and 17 and the idle roller 18'. No attempt has been made feeding mechanism asv actual operating ded Vices, such 'mechanism beiner too well known to require illustration. The mechanisms provide a loop 19 and a loop 2O in the film 'for permitting the proper actuation by the Geneva1 movement. Upon the machine, usually'upon vthe door, a shield 21 is positioned, into Wl'iich, at times., especially times of breakage or interruption, the loop 19 is projected by enlargement. The breakage of the film or interruption from other cause ordi# narily occurs at or about the exposure apen ture indicated by the ,ar-rovi' 22. ln case of such interruption the Geneva Jfeed continues to draw down the portion oi the 'film below the aperture 22 but passage oi the film over the roller 18 stopr's. The uniform leed roller 17, 'therefore enlarges the loop 19. 'At the 'rearof the loop 19 and positioned to swing' baclrwardly into the shield 21 a hand 23 is provided.y mounted upon a rock shaft 24, jonrnaled to 'the projecting' mechanism in any approved manner as by the brackets 25. Flock shaft Q4- carries an arm 26 pivoted to a detent rod 27 which extends out beneath a finger 28, secured tothe closure 11 in any approved manner, as by being formed.

inteffral with the wire secured to the' clo-v sure 11 by the clips 30. The rod27 is mounted to reciprocate in any approved 'type or mechanism as the bracket 31 and a spring'v is employed to hold the rod 27 normally and yiclding'ly beneath 'the linger 28. A stop 33 is also provided to-limit the movementv oi" the arm 26 being' here shown as carried rigidly by the bracket 3l, it being umlerstood7 however. that the manner of supporting or mounting! thel 'stop 33 is notv essential,

to illustrate this 'ardly ico ln' case of interruption of thel film the Geneva feed and the unil'oi mi \v driven roller 1 6 continuo' to feed thel lowerv severed section o"' the film until such section passes l105 over the roller 16 whereupon the section 3l of the iilm between the roller 16 and the v magazine 14 released'from engagement,

the hand 23.

'tirer the wel sentieri wlmi/"l claim :is View Mul desire t A roller forming u part of the present invention, carried hy n :uhm il@ which in turn is carried hy er integral with ai rec-lt Shaft il? with u lever 558 carried thereby standing normally substantially .f'erticil. il, Spring Si? is previlled tending te hold the roller 35 against the section 34 e" the lni and. irieuse of interruption intl release of Such section te drew th' roller $35 out el" normal pofsitien, The swinging of the roller 35 causes the lever to drew rilmvmvurdly 0n the md /ll'l which is pruvideil with :i lei fegiiig zt Wing upon the roel;

tent l 'l Shaft 24. lie swinging et' the roller 3? Wilh therefore, draw (flown the wing if? reeking,r the shaft 24. Athe effect being' exactly the same :is when such rocli shaftis actuated by permit the rod al() te be moved upwardly te normal position the Wing' l-S. 's shown in the drawing the lets-et is provided with :in erm i a hoek llhee-king Ll() permit .iwf the te @wil in eee dire-ation or te movement iii tl.I opposite direction.

lt will there lie Seeii that whenever breakage or inte uptieii occurs in the Film the mechanism uflziptecl to employ a change in tlieieeiiflitien of the film either above or helow the exposure aperture te trip and elese the clesure l. interrupt the light prejectetl upon the film. lli View el: 'the speed ait which e film travels? pesi: the 'expesure apertui l, the elesure or @over meinber ll elses :ilme'st instantaneously upon 'the interruption et suchlm.

ln e'ierzitieii the parts will be associate-fl as Shown in the drawings. il/Yhen interrum- 'l'firn mf the film occurs loep l5? will be eil because (rf the failure of the leneya mmeiiieii; to (feiitinue 'feeding the film :ilee the tien blwill he released hy een tieuefl feeding); el" the uniformly rlriveu feller lil, iii mth musea the fever' n'lei'nher ll will he r( leased hy rocking the rock shalt 2 :uml drawing the rml 27' from Supper# ix'igpositimi miti this linger 28. n living thus fully (lesrrihefl my Swirl Secure Letters I: l. The comhiueli'ieii with :i picture prrr jeetmg sippuxf'zitus embodying :i seul-ee of light, :it liliu spanning' a prujeetiiig aperture uml ilm moving mef-hzuiisui upon opposite Sides of the aperture. el? :1 rock-shaft herizeutally mounted upon lle :inymiutiie` :i lesure for the seuire of light,u :i fleteut movable with the rec! hull eauliug to Imrmzil'ly hohl the closure operi, rock-shaft eperzrting mechzuiisius un eppusite sides of the aperture uml menus whereby u rlmugge in iur Sition o the film upm) either Sizle nl the aperture mm'rs the ruilt-#huilt operati mer-hummm l'rum ufirzuulll; tu releiie the elmure,

The lleteut lll adapted te rock-shaft mnu'iitml' horizontally :ilieve the 2, The combinatie-11x with Aa. picture prrr jectiug apparatus .embodying e source of light, u lilm slimming u projecting ziperture null film-moving mechanism upon oppusite sideS el the aperture. el' :i rock-shalt mounteel horizontally zihme the aperture, u closure im; the source of light haring 2i linger extendingtherei'renu :i hrurket secured te the apparatus below the recl-;-e.urlt, i leteiit rml. movable with the i`e lsliul't und Supported by the ,b1-ziekenr said ileteiit red uormully Supporting; the closure by engagement with the linger thereon, reelosha'ft operating mechaii'ieeis en opposite sides of the aperture, means whereby a, el'iaiige in position et' the ilm epee either Side of the aperture moves the 'roelesheft ope ating mechanisms from normality te ielezie the closure. Y 3. eeml'iirietiezi with e picture jeetiiig :ip igmaltue embeilying sei-.ieee of light, e ning @rejecting aperture mechanism .upon eppesite d @im movr sltlesef the :aperta ed heiligen ally elseif-e tlie aperture au@ prevideel. wim au erm exit/enfle@ therelroiii, u elesure for the, eeiiree eff iight lie-ving 'a tin# Ager extending tlieretreiei, e deterit rofl semired-te arm et the rock-shaft and sup- Ipei-ted for sliding movement, said detent roll adapted t@ support .closure by engagement with. the linger thereon when the red is extended te Rermelity3 means te nm'u'uilly keep the dete. t. in extended positieri, menne te limit 'the extension of the deteiit red, rock-shaft operating mechanisms en eppesite Sides et aperture and mesme@ whereby e change in positieii ot' the film upon either side el.2 the aperture withdraws the (letelut 35ml from normality te release the elesere.,

il. The combination. ef iup; apparatus ememlyizw pieture projectzt seuree of light,

:t u" speuuing :i pregeetiug aperture, ilm Treeeli le; mechanisms :uliwtetl to .iiiziintiiiu :i

und the stel-:ige pesitien et the ilm, el

aperture, e. clesure 'lier the Seuiee 'of light, i. (leteiit movable with 'the rechi-shaft temlingle normally held the elesure operi, mezrue pesitieneil adjacent the loep iulepterl tu re-. lease the (letei't upon enlargement el' the loep or 'iiiterruptieii el the i'ilm and means engaging the relatively tuut seetien to releziee the ileteut upon the rele-use et' the taut section.

5, The emuhiriutiau el :i picture prejectiugi :ij'ipurutue @zulu-)dying n. :source elf hgh@ zi fihi spamrun@ :i prfriecting' aperture, Vi'ilm.

i'eetliii.; giechaui. s zuluptefl te maintain n leu) iet een the miectmg upeture :zml the m supply :nul to iiiuizitein :i re!- iy :Mui section between the aperture mul re, et e rech-shaft meunt- 4ed to .enppo rt the storage position of the film. ot a roeltshaft mounted horizontally above the aperture.I a Closure for the source o'l light having a linger extending therefrom, a bracket seJ Cured to the apparatus below the recit-shaft, e detent rod movable with the rock-shaft and supported by the hraelret. said' detent rod normallyv snpportino the closure by e`ngagement with the linger tliei'e ni.;ir1eaiis positioned adjaeent the loop adapted to roelt the rook-Shaft and release the detent upon enlargement ot' the loop in eonseonenee 'ot an Vinterruption ot the lilm and means engaging the relativeljv7 taut section adaptml to roel;

the, rock-"hatt and release, the detent upon' the release ot' the taut slet/ion.

6. The combination witha picture projecting apparatus embodying a source of With the rook-strait and su-oorted bv the l i bracket. said detent rod normallyv supportme' the Closure b v engagement with the ringer thereon and means whereby' an expansion ot the loop ot tilm moves the melt-shaft operating mechanism Yfrom i'iormalitf,7 to release the closure. v

"l". The combination with a picture projecting arparatua embod gr; a Souiee ot light. a lilzn spanning; a pin n-etnie.aperture and film iheding merhanisun adapted to ma iV a loop in the liln'i above tl e aperture. a roeli-shai't mounted horizontallyv above the aperture and provided with an arm erztenllinn' therefrom. a elosure ,for the Sonfee ot' lip; n having a iingrer extending "rom, a laraehet neenred to the apparatus below the roelt-s-:halt a detent rod seein-ed to the arm oi' the welt-shalt and snpported hy the braehet i lin are by engagement with the tirA reon when the rod inex- -tended to norma It f. menne to normall \v lieep lie df extended position. means to limit, ion olA the detent rod and means wherebyv a eliange in poailiou ot the film above the aperture iwl'hdrawev the detenty rod Atroni normalitv to releiwe the. elosnre.

S. The combination ot' a pietuze projet-tingapparatuf: embodviu;r a f-:ouree ot light'.

t rod tire exten,-

id dete'nt rod adaptot light and a for constraining the motion of the tetent,

am ein and means engaging the relativel)v tant seetion to release the detent upon release ot the j aperture and provided with an arm extendingr tlieretrom,a closure ior the source ot lig-ht havinga finger extending therefrom. a bracket secured to the ap] aratus below the roch-shaft. a detent rod seein-ed to the arm of the rock-shaft and supported by the bracket, Said detent rod adapted to support the closure by engagement with the tinger thereon when the rod is extended to normality. means to normallyv keep the detent rod in extended position, means to limit the extension ot' the detent rod. Voelt-Shaft operatinje` meehanism providingl means wherelrv a rhan e in the relativelvtaut Sei-tion withdraws the detent rod :troni nornnilit).v to release the closure.

ll). ln a pit-ture projeetingl1 apparatu.` having a moving light-transmitting film` and means to maintain a loop therein. a source ol light and a hood having an opening tor diret-tingY the light. the Combination ot' a shutter pivoted at the top ot' the hood and tangentiall)1 to the peripher \v ot' the opening to (fut oill the light at times. a detent to hold the Shutter normallwv in open position. means attached to the detent adapted to eontaet with an abnormal loop in the vfilm to release the detent and allow the shutter to fall to rut oliI thelig'ht and a oraeket tor supportingr and 2guidinflr the detent.

ll. in a picture projecting apparatus having a moving light-transmitting lilm. and means to niaintain a loop therein. a source olt light and a hood t'or direetingr the light` the eombinationot a shutter pivoted at the top of the hood to ent oil' the light at times. a Slidable detent to normallyhold the shutter in open poSition. a wing` attaehed to the detent and means in eontaet with a portion ot the lilm at a distant-e "from the wing and adapted on rupture o'li the 'rilm to move the win;Y and release the detent them-ib)v allowintr the shutter to tall and eut oli' the light.

l2. in a picture projeeting apparatus having` a 'moving light-trausmittinlr tilm. and means to maintain a loopthereiu. a source hood "ror direeting the light. the Combination o't a shutter pivoted at the top ol`A the hood to eut ott the light at times. a slidable detent to normally hold the shutter in open position. a wing attaehed to the detent and means held in position by the tension ot the film and adapted when. released to aetuale the wingnncl detent, said meansposition, a Wing having; :i

Yan abnormal loop t0 i'lezasn Comprising a linli' aflaiz@ he Wing, a member' norma ,ci Lliao and a fixed support iii which sani laila? member yis pivoeil.

n a picture pz'ojeciinjy appziig'aus llaving a moving lig'lx'ti .Y ii/1y; ilm, and imams to maintain loop iierein, :i source 0l .lig'li and lmml for (lii'e i-ii1g the light, the {lombination of a Sliu'i piioed at lf3 top of the hood ibo mit ellthey light at limos, a (le liol the Slium' iioimallf in open pivotal comi-(felina pacl im lio iiifived.

"is (le/eilt and iwf-iby out fentto with. lille deventl'aml alle7 the shuai' to fall and t the light. a v

la. ln a pic-mire projecting appaiaus film, a source me light, a lmod having an @peiling thfiefoi@ a slmaif pivnzecl tangentially lo the peiipliei'y of the opening of *lle hood, and exending 'foward the film 'wl'ei Open, and a delfini movable toward and from' the shutter? aiifl adapted in one posiiuion 'fao @ngage the sliutei to hold i5: opei l5. ln a picture pioj'ec'iiig apparsi-iis, film spanninga moja-fling apar/ure? a Source 0f light, a lio@ L tlrelbr having an opsning i, sliuei pivoed tang@ i ly to lie'peiialiery of the @peni x, v i lic-ml, amil. @msn L- ing toward 'lie lila" movable toward au aalaped when nim* lie sliuf* 1i., mg; @Cling zi,

'iu'a conmlled by die film. amil adapte@ $30 witlzlli'aw said 3 ateii.

16. ln apictiii'e pzojecinp; apparatus, a Slm qpaiming :i projecting apeiure, a Source of light` a lmml ti'iei'elfoi having ail openingsu sliu'tm pivoted taiigeniallv to the periph- Qry nl: *lie opami'ng 0l lie liood, and Qxending' owuixl he film when Openi and a (leet movable inward and from the Shutter, and adapted when moved toward h@ shutter to eiigag@ the Sliii'iei' and hold it open, and means wliai'eby a change in the posiian of the Elm al, eitliifi Side mi' lie 'i'uojeclging aperui'@ may i'eizaci; said alumni; and pcl'mi the lf?. Li a picture piojeciiigg apparatuss, ailm7 fr source of ligliz, a hood therefor having w 

